Furniture Anti-Tip Telescopic Rods, 2 Sets of 2

This is a furniture anti-tip telescopic rod to prevent furniture from falling during an earthquake.
It's also recommended as an earthquake-resistant product for offices with many bookshelves and cabinets.
No nails or tools are required as it simply braces against the ceiling with a tension rod.
The large contact surface area securely holds the ceiling and furniture even during shaking.
Additionally, the contact surface is made of foamed polyethylene material, which is less likely to scratch ceilings or furniture. Comes as a set of 2.
Purpose: To prevent cabinets, bookshelves, etc. from tipping over due to earthquakes.
Furniture Anti-Tip Telescopic Rod

Used for about 3 years.
No longer needed as two shelves have been disposed of.
How about this for earthquake preparedness?
The shorter one is about 40-60 cm.
The longer one is about 62-100 cm.
For those who understand that this is a used item.